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  <body>
    <div class="logos">
      <img src="images/dragonfly-plate-reverb/dragonfly-plate-logo.png" />
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    <h1>Introduction</h1>
    <p>
      Dragonfly Plate is a free mono-to-stereo reverb plugin based on
      <a href="http://freeverb3vst.osdn.jp/tutorial/tutorial_vst_nrev.shtml">NVerb</a> and
      <a href="http://freeverb3vst.osdn.jp/tutorial/tutorial_vst_strev.shtml">STRev</a>
      from Freeverb3 VST.
    </p>
    <h1>User Interface</h1>
    <img src="images/dragonfly-plate-reverb/interface.png" />
    <h2>Sliders</h2>
    <img src="images/dragonfly-plate-reverb/sliders.png" />
    <dl>
      <dt>Dry Level</dt>
      <dd>
	<p>Level of the input signal sent to the output</p>
      </dd>
      <dt>Wet Level</dt>
      <dd>
	<p>Level of the reverb signal sent to the output</p>
      </dd>
    </dl>
    <p>
      The output of the Dry and Wet controls are combined to
      form the reverb’s output signal. Note that sliders are not
      controlled by the presets. This allows you to set the levels in
      a way that works for your project, and then explore different
      presets without the sliders changing.
    </p>
    <h2>Preset Browser</h2>
    <img src="images/dragonfly-plate-reverb/presets.png" />
    <p>
      The Preset Browser section presents a variety of plate
      and tank presets that set the reverb type and the dials.
    </p>
    <h2>Reverb Type</h2>
    <img src="images/dragonfly-plate-reverb/reverb-type.png" />
    <p>
      The Reverb Type section presents three different plate
      reverb algorithms:
    </p>
    <dl>
      <dt>Simple</dt>
      <dd>
	<p>
	  This thin plate algorithm is a derivative of
	  <a href="https://ccrma.stanford.edu">CCRMA</a>
	  <a href="https://ccrma.stanford.edu/software/stk/classstk_1_1NRev.html">Nrev</a>.
	  It has a sparse tail and some slight early reflections.</p>
      </dd>
      <dt>Nested</dt>
      <dd>
	<p>
	  This thick plate algorithm is a modification of the Simple
	  Allpass algorithm with a dense tail and no early
	  reflections.
	</p>
      </dd>
      <dt>Tank</dt>
      <dd>
	<p>
	  This algorithm is based on the reverb effect described in
	  <a href="https://ccrma.stanford.edu/~dattorro/EffectDesignPart1.pdf">
	    Jon Dattorro's AES article
	  </a>
	</p>
      </dd>
    </dl>
    <p>
      Although a preset will automatically select a Reverb Type,
      another algorithm can be selected after picking a preset to hear
      how the alternative algorithm sounds with the given dial settings.
    </p>
    <h2>Spectrogram</h2>
    <img src="images/dragonfly-plate-reverb/spectrogram.png" />
    <p>
      The spectrogram has been included to give a better idea of how
      the various reverb parameters affect the plugin’s output. The
      spectrogram is rendered by simulating a burst of white noise
      through the reverb algorithm with the current settings, and then
      processing the output with a fast fourier transform algorithm.
    </p>
    <p>
      Clicking on the “?” displays the plugin name, version, license,
      and credits.
    </p>
    <h2>Dials</h2>
    <p>
      Note that holding the Shift key and clicking a dial will reset
      the dial to the default for the current preset.
    </p>
    <img src="images/dragonfly-plate-reverb/primary-dials.png" />
    <dl>
      <dt>Width</dt>
      <dd>
	<p>
	  Output stereo width.
	</p>
      </dd>
      <dt>Predelay</dt>
      <dd>
	<p>
	  Delay before the onset of the reverberation.
	</p>
      </dd>
      <dt>Decay</dt>
      <dd>
	Length of time for the late reverberation to decrease by 60dB.
      </dd>
    </dl>
    <img src="images/dragonfly-plate-reverb/frequency-dials.png" />
    <dl>
      <dt>Low Cut</dt>
      <dd>
	<p>
	  A high pass filter applied to the input signal before
	  processing the reverb algorithm.
	</p>
      </dd>
      <dt>High Cut</dt>
      <dd>
	<p>
	  A low pass filter applied to the input signal before
	  processing the reverb algorithm.
	</p>
      </dd>
      <dt>Dampen</dt>
      <dd>
	<p>
	  A low pass filter applied to the reverb algorithm's
	  feedback loop.
	</p>
      </dd>
    </dl>
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